DI Jack Mooney and the team are left puzzled when Diane Smith, fiancee of hotel billionaire Philip Marston (pictured), is found dead the day before her lavish wedding. All evidence points towards suicide, but Jack is convinced there's more to this case than meets the eye and turns his attentions to her family to be. With the victim's room locked from the inside and all suspects in different locations around the hotel, how could any of them have committed murder? Puzzled by a single painted nail on the victim's hand, Jack is determined to prove foul play, despite the Commissioner insisting on closing the case. With a distinct lack of physical evidence, the team have a tough task on their hands. Meanwhile, Jack discovers a local island delicacy, while his daughter Siobhan has a tough decision to make. Elsewhere, Dwayne finds himself in hot water with former flame Audrey. Ardal O'Hanlon reprises his role as DI Jack Mooney, joining series regulars Josephine Jobert, Danny John-Jules, Tobi Bakare, Elizabeth Bourgine and Don Warrington, plus an exciting line-up of guest stars for more baffling murder cases and warm-hearted Caribbean fun.